Question

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to y from the first equation is substituted into the second equation. 15x − y = −6 5x-3y=-13.

Answer 1

15x - y = -6.5
y = 15x + 6.5

the new equation is
5x - 3(15x + 6.5) = -13

5x - 45x - 19.5 = -13

-40x = 6.5